// SPDX-License-Identifier: GPL-2.0-only /* * Copyright 2007-2010 Red Hat, Inc. * by Peter Jones <[email protected]> * Copyright 2008 IBM, Inc. * by Konrad Rzeszutek <[email protected]> * Copyright 2008 * by Konrad Rzeszutek <[email protected]> * * This code exposes the iSCSI Boot Format Table to userland via sysfs. * * Changelog: * * 06 Jan 2010 - Peter Jones <[email protected]> * New changelog entries are in the git log from now on. Not here. * * 14 Mar 2008 - Konrad Rzeszutek <[email protected]> * Updated comments and copyrights. (v0.4.9) * * 11 Feb 2008 - Konrad Rzeszutek <[email protected]> * Converted to using ibft_addr. (v0.4.8) * * 8 Feb 2008 - Konrad Rzeszutek <[email protected]> * Combined two functions in one: reserve_ibft_region. (v0.4.7) * * 30 Jan 2008 - Konrad Rzeszutek <[email protected]> * Added logic to handle IPv6 addresses. (v0.4.6) * * 25 Jan 2008 - Konrad Rzeszutek <[email protected]> * Added logic to handle badly not-to-spec iBFT. (v0.4.5) * * 4 Jan 2008 - Konrad Rzeszutek <[email protected]> * Added __init to function declarations. (v0.4.4) * * 21 Dec 2007 - Konrad Rzeszutek <[email protected]> * Updated kobject registration, combined unregister functions in one * and code and style cleanup. (v0.4.3) * * 5 Dec 2007 - Konrad Rzeszutek <[email protected]> * Added end-markers to enums and re-organized kobject registration. (v0.4.2) * * 4 Dec 2007 - Konrad Rzeszutek <[email protected]> * Created 'device' sysfs link to the NIC and style cleanup. (v0.4.1) * * 28 Nov 2007 - Konrad Rzeszutek <[email protected]> * Added sysfs-ibft documentation, moved 'find_ibft' function to * in its own file and added text attributes for every struct field. (v0.4) * * 21 Nov 2007 - Konrad Rzeszutek <[email protected]> * Added text attributes emulating OpenFirmware /proc/device-tree naming. * Removed binary /sysfs interface (v0.3) * * 29 Aug 2007 - Konrad Rzeszutek <[email protected]> * Added functionality in setup.c to reserve iBFT region. (v0.2) * * 27 Aug 2007 - Konrad Rzeszutek <[email protected]> * First version exposing iBFT data via a binary /sysfs. (v0.1) */ #include <linux/blkdev.h> #include <linux/capability.h> #include <linux/ctype.h> #include <linux/device.h> #include <linux/err.h> #include <linux/init.h> #include <linux/iscsi_ibft.h> #include <linux/limits.h> #include <linux/module.h> #include <linux/pci.h> #include <linux/slab.h> #include <linux/stat.h> #include <linux/string.h> #include <linux/types.h> #include <linux/acpi.h> #include <linux/iscsi_boot_sysfs.h> #define IBFT_ISCSI_VERSION … #define IBFT_ISCSI_DATE … MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_VERSION(…); static struct acpi_table_ibft *ibft_addr; struct ibft_hdr { … } __attribute__((packed)); struct ibft_control { … } __attribute__((packed)); struct ibft_initiator { … } __attribute__((packed)); struct ibft_nic { … } __attribute__((packed)); struct ibft_tgt { … } __attribute__((packed)); /* * The kobject different types and its names. * */ enum ibft_id { … }; /* * The kobject and attribute structures. */ struct ibft_kobject { … }; static struct iscsi_boot_kset *boot_kset; /* fully null address */ static const char nulls[16]; /* IPv4-mapped IPv6 ::ffff:0.0.0.0 */ static const char mapped_nulls[16] = …; static int address_not_null(u8 *ip) { … } /* * Helper functions to parse data properly. */ static ssize_t sprintf_ipaddr(char *buf, u8 *ip) { … } static ssize_t sprintf_string(char *str, int len, char *buf) { … } /* * Helper function to verify the IBFT header. */ static int ibft_verify_hdr(char *t, struct ibft_hdr *hdr, int id, int length) { … } /* * Routines for parsing the iBFT data to be human readable. */ static ssize_t ibft_attr_show_initiator(void *data, int type, char *buf) { … } static ssize_t ibft_attr_show_nic(void *data, int type, char *buf) { struct ibft_kobject *entry = data; struct ibft_nic *nic = entry->nic; void *ibft_loc = entry->header; char *str = buf; __be32 val; if (!nic) return 0; switch (type) { case ISCSI_BOOT_ETH_INDEX: str += sprintf(str, "%d\n", nic->hdr.index); break; case ISCSI_BOOT_ETH_FLAGS: str += sprintf(str, "%d\n", nic->hdr.flags); break; case ISCSI_BOOT_ETH_IP_ADDR: str += sprintf_ipaddr(str, nic->ip_addr); break; case ISCSI_BOOT_ETH_SUBNET_MASK: val = cpu_to_be32(~((1 << (32-nic->subnet_mask_prefix))-1)); str += sprintf(str, "%pI4", &val); break; case ISCSI_BOOT_ETH_PREFIX_LEN: str += sprintf(str, "%d\n", nic->subnet_mask_prefix); break; case ISCSI_BOOT_ETH_ORIGIN: str += sprintf(str, "%d\n", nic->origin); break; case ISCSI_BOOT_ETH_GATEWAY: str += sprintf_ipaddr(str, nic->gateway); break; case ISCSI_BOOT_ETH_PRIMARY_DNS: str += sprintf_ipaddr(str, nic->primary_dns); break; case ISCSI_BOOT_ETH_SECONDARY_DNS: str += sprintf_ipaddr(str, nic->secondary_dns); break; case ISCSI_BOOT_ETH_DHCP: str += sprintf_ipaddr(str, nic->dhcp); break; case ISCSI_BOOT_ETH_VLAN: str += sprintf(str, "%d\n", nic->vlan); break; case ISCSI_BOOT_ETH_MAC: str += sprintf(str, "%pM\n", nic->mac); break; case ISCSI_BOOT_ETH_HOSTNAME: str += sprintf_string(str, nic->hostname_len, (char *)ibft_loc + nic->hostname_off); break; default: break; } return str - buf; }; static ssize_t ibft_attr_show_target(void *data, int type, char *buf) { … } static ssize_t ibft_attr_show_acpitbl(void *data, int type, char *buf) { … } static int __init ibft_check_device(void) { … } /* * Helper routiners to check to determine if the entry is valid * in the proper iBFT structure. */ static umode_t ibft_check_nic_for(void *data, int type) { … } static umode_t __init ibft_check_tgt_for(void *data, int type) { … } static umode_t __init ibft_check_initiator_for(void *data, int type) { … } static umode_t __init ibft_check_acpitbl_for(void *data, int type) { … } static void ibft_kobj_release(void *data) { … } /* * Helper function for ibft_register_kobjects. */ static int __init ibft_create_kobject(struct acpi_table_ibft *header, struct ibft_hdr *hdr) { … } /* * Scan the IBFT table structure for the NIC and Target fields. When * found add them on the passed-in list. We do not support the other * fields at this point, so they are skipped. */ static int __init ibft_register_kobjects(struct acpi_table_ibft *header) { … } static void ibft_unregister(void) { … } static void ibft_cleanup(void) { … } static void __exit ibft_exit(void) { … } #ifdef CONFIG_ACPI static const struct { … } ibft_signs[] = …; static void __init acpi_find_ibft_region(void) { … } #else static void __init acpi_find_ibft_region(void) { } #endif #ifdef CONFIG_ISCSI_IBFT_FIND static int __init acpi_find_isa_region(void) { … } #else static int __init acpi_find_isa_region(void) { return -ENODEV; } #endif /* * ibft_init() - creates sysfs tree entries for the iBFT data. */ static int __init ibft_init(void) { … } module_init(…) …; module_exit(ibft_exit);
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